Machine for producing wall board



May 9, 1933. J. DEAN 1,908,658

MACHINE FOR PRODUCING WALL BOARD Filed Aug. 18. 1931 2 Sheets-Sheet l 2 L11 \J O J F T T i m a:

a W I I2 a e a m I; 1% $3. a: g Q Q h 2 I w a", v 3 E 1 Q a 0 1 E I "W 55; Q Q 8 H 219 Q! "I" q E I: HIHHI m l! u a W J u .1 3 I a ,"a J (Y D G] M I 1;: cr 1 INVENTOR. JOHN DEAN ATTORNEY May 9, 1933. J. DEAN 1,908,658

MACHINE FOR PRODUCING WALL BOARD Filed Aug. 18, 1931 2 Sheets-Sheet 2 INVENTOR. JOHN DEAN ATTORNEY Patented May 9, 1933 V I V I UNITED STATES PATENT OFFICE V JOE-H nuns, or an: Immersed camonun- I momma 1 -01:. rnonucnm 3043.];

Application fled August 18, ion. Serial llo. 557,775.

The present invention relates to 'new and view including the feeding hopper, feeding useful improvementsinautomatic machinery screw, compression rolls, corrugating roll and especially to that type of machinery and the baking oven for baking the strip as adapted to produce building materials such it leaves the compression rolls; e as composition wall board and is partlcular- Figure2 isa plan detail illustratin afrag- 58 ly adapted to producing that class of wall ment of the corrugating roll and 5m edge 7 board described and claimed in my co-pendtrimming or bevellmg cutter;

ing patent application for composition wall Figure 3 is an enlarged sectional detail board, filed July 3, 1931, Serial No. 548,611. illustrating the bed-plate of the machine, a

19 T611131 purgosia1 of 1the pfisent machine to sectlon of the cfinveyor belt and a set of the no qui y an c eap y pr me a composi 1011 compresslon re sr wall board of the type described m'my co- Figure 4 is a tip plan view of the entire pending application that fproduce al csgnfinachine showing th; hopper, feedin screw, tinu u sl b of wall ar om a a 10 rivin means there or conv o b t co 13 Stat: ti th e finished and baked 'produ t, the pressifn rolls andbakiiig fringed; e m 66 machine also embodying means for feeding Figure 5 is an enlarged sectional detail of a remforcmg material to the slab as t Is bea portion of the machme showing a set of mg formed a-nd means for corrugatlng the compression rolls and the means for a d11 1stmaterial as 1t 1s passed through the machme mg the upper compression rolls relatlve to alllso mezanilfor ibevtellmight he slge edvgiefi g: the lovvler :(anrefi10ilinr0ll5S, t5h seetlon bil temaen so a'ma mgeges 1n mcae e es in 1 re tightly together when nailedin place Figure 6 is ad enlarged sectional data oi The1 principalhpkjectfoffihe invenglon 1% t3 tlie lfied-plgfle of 'tlga machine and showing (inc provi e .a mac e o t e type escri e o t e an ar y isposed rotary cutters or 35 which will produce fromplastic materlal a bevelling the side edges of the slab as it 7 fzompogltton wall board in a continuously passes tighirgugllilthl ianm22s 211e,E thhe SBCtlZD. bellg orme s up. w in ma y e e 0 igure an d Another l210] ;ectfoizhthelmvegitionbiesdto 1131;; Figure 7 1s a sect1onal detall of the portion uce a mac e o e c ass es i W '0 of the finished wall board showin the we will produce a continuous strip of reinforced id formed by the corrugating rolls arid Wall rolled to exact thickness, the bevelled abutting ends of the strips. f g qdl mhe i and finally baked 35 1t Referring more particularly to the draweaVQS 9 mac ings in which the preferred form of my in: n another Q l of the mventlen to vention is disclosed, the numeral 10 in a gen- 3 Provlde a machme of the class descnbed eral way designates an elongated rectangular which is entirely automatic in its operation and which will produce a continuous strip or frame haivmg 1 rights and slab of wall board at a minimum cost of sald upmghts a sultable has? 16 and manufacture a table 17, the uprights 13 and 15 belng pro- Additional to the foregoing objects is that Z g :;i :g $g 5 i of providin an automatic machine of the type described which is comparatively simlournaued the P T rollers 18 and 16 1 1 i ti d g easy to opfmte. 19 are lpiizvged with a suitable endless cont ero jects an a vantageso my inveny e tion will become apparent with reference to T conveyor belt 2 15 p e to Shde the subjoined specification and th accomovei'1 the table If? and said table 17 1s provided i ot h t f d i i hich; wit a series o spaced slots 23 for the recep- 11Figuie 1 is a longitulinal sectional view tion of a series of compression rolls 24 over i ustrating my improve automatic machine which the conveyor belt passes said rolls befor producing composition wall board, the ing flush with the top of the table so that the I conveyor belt will cause the rotation of the same.

Arranged directly above the compressionrolls 24 are a series of compression rolls 25 said rolls 25 being adjusta le'to vary the thickness of the slab 26 by means of screw adjustments of suitable character 27, as clearly indicated in Figure 5. The matenal 26 1s pressed between these rolls as it is carried toward the end of the machine by the conveyor belt 22 and the end upper roll 28 is the corrugating roll and is provided wlth a series of wav ridges and depressions 29, as indicated in igure 2.

The forward end of the machine s provided with a suitable tubular casing 30 ri idly mounted between the uprights 11 and 12 and said tubular member terminates in a flared mouth 31, as clearly indicated in Figures 1 and 4. A spiral screw 32 is j ournaled in the tube 30 and is carried by a shaft 33 having one end projecting through a stuflingbox 34 the outer end of said shaft carrying a pulley 35 belt-connected by means of a belt 36 to a small pulley 37 carried on the motor shaft 38 and driven by means of a suitable motor 39 mounted on the forward end of the machine.

The outer end of the shaft 38 is provided with a suitable worm 40 which Worm meshes with a worm gear 41 carried by the shaft 20 and said worm and worm ear cause the functioning of the conveyor belt 22 at the desired speed. The relative speeds of the screw 32 and the conveyor belt 22 being such that the screw will force sufficient plastic material through the mouth 31 and on to the conveyor belt 22.

The end of the machine frame is provided with a suitable housing 42 which provides a baking oven having suitably arranged gas burners having their jets disposed downwardly upon the face of the slab as it is drawn through the machine, the burners being controlled by means of suitable valves 43.

A roll of burlap 44 is mounted in the forward end of the machine and is carried by the shaft 45 and the free end of the burlap is led over the roll 18 and on to the conveyor belt 22 and as the plastic material forming the strip or slab is forced out through the mouth 31 it causes the burlap to adhere to the conveyor and pass through the rollers and is compressed into the body of the plastic material and forms a reinforcing element as a base for the slab.

As the slab leaves the corrugating roll 28 it passes between angularly disposed rotary cutters 46 and 47, Figures 1, 2, 4 and 6, said rotary cutters tending to bevel the side edges of the slab to provide suitable abutted faces 48, as clearly indicated in Figures 6 and 7.

The operation of the machine is as follows:

A plastic material such as gypsum and sawdust is placed in the hopper 49 of the machine and gravitates through the o ening 50 and into the screw chamber from w ence it is forcibly compressed into the tubular casing 30 and out through a flared mouth section 31 thereof.

When the plastic material leaves the mouth 31 it is in the form of a ribbon approximately one-half of an inch in thickness,'the conveyor belt then picks it up together with the continuous strip of burlap and carries it between successive sets of compression rolls until it has become thoroughly compressed and at this stage it passes under the corru ating roll 28 which causes it to be corrugateddongitudinally throughout its length.

The slab as thus compressed and corrugated then passes between the bevellin cutters 46 and 47 and the side edges thereo are accordingly bevelled, the bevelled and corrugated strip or slab then passing through the baking oven to cause it to be set'and dryed to a considerable extent.

The slab in its continuous state is then carried outwardly by the coveyor and is cut transversely in squares or sections of any suitable size by any suitable cutting means not shown.

It is obvious that a machine of this character when in operation will continuously produce a slab of composition material at a minimum cost per square foot and at a minimum expenditure of both time and labor.

I claim and desire to secure by Letters Patent of the United States the following 1. A machine of the class described comprising, a hopper having a flared material spreader, screw means associated with said hopper and adapted to force the plastic material outwardly, a conveyor-belt, a series of compression rolls arranged to receive the plastic slab and compress the same as it passes therebetween, corrugating rolls for corrugating one face of said slab, rotating elements for bevelling the side edges of said slab, and

means for finally baking the compressed slabs.

2. A machine of the class described comprising, a hopper having a flared material spreader, screw means associated with said hopper and adapted to force the plastic material outwardly, a conveyor-belt, a series of compression rolls arranged to receive the plastic slab and compress the same as it passes therebetween, corrugating rolls for corrugating one face of said slab, means for feeding a reinforcing strip to said conveyor-belt, means for bevelling the side edges of said slab, means of finally baking the compressed slabs,

and means for driving said screw and said,

conveyor-belt.

3. A machine of the class described-for producing composition wall board, in combination. a supporting frame, a table carried by said supporting frame, a conveyor-belt mounted in said frame and having one seetion thereof adapted to slide over the table, a plurality of compression rolls arranged in pairs, means for supplying reinforcing material to said conveyor-belt, and means for forcing a ribbon of plastic material onto said reinforcing material and between said sets of rollers, and cutters arranged in said supporting frame adapted to bevel the edges of the slab.

4. A machine of the class described for producing composition wall board, in combination, a supporting frame, a table carried by said supporting frame, a conveyor-belt mounted in said frame and having one seetion thereof adapted to slide over the table, a plurality of compression rolls arranged in pairs, means for supplying reinforcing material to said conveyor-belt, means for corrugating the outer surface of the slab longitu- 2 dinally, means for forcing a ribbon of plastic material onto said reinforcing material and between said sets of rollers, and means for bevelling the side edges of said slab.

5. In a machine of the class described, a

table, an endless conveyor-belt adapted to slide across said table, a plurality of sets of compression rolls-arranged on opposite sides of said conveyor-belt, means for feeding a strip of reinforcing material to said conveyorbelt, means co-acting with said conveyor-belt to bevel the side edges of said plastic material, and means for driving said conveyorbelt, said bevelling means comprising angularly disposed rotatable discs arranged on 5 opposite sides of said table.

In testimony whereof, I hereunto afiix my signature.

JOHN DEAN.- 

